Part 1 - CONCEPTS from this week's assigned readings and presentations

(2 pts per question / 20 total)

1. If homogeneity of variance is violated for an independent samples t-test, what nonparametric test should be considered?

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2 What is the nonparametric equivalent to a One-way repeated measures ANOVA?

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3Which nonparametric tests can be used with nominal data?

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4Complete the following statement: Nonparametric tests are usually ____________ to compute than parametric tests but they are less _______________.

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You notice in your introductory psychology class that more women tend to sit up front, and more men sit in the back. To determine whether this difference is significant, you collect data on the seating preferences for the students in your class. The data is presented in the table below (you'll have to complete the rest of the table to answer the following questions):

Men

Women

Row Totals

Front of the room

19

23

Back of the room

30

27

Column Totals

5 How many students total were counted (both men and women)?

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6 Calculate the Expected Frequency for each cell (rounding to two decimal places). Put them in the appropriate cells (in parentheses next to the observed frequency).

Men

Women

Row Totals

Front of the room

19 (Answer)

23 (Answer)

Back of the room

30 (Answer)

27 (Answer)

Column Totals

7 What is the observed 2?

Work:

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8 What is the critical value? Do you accept or reject the null hypothesis?

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Read the scenario and pick the most appropriate nonparametric statistical test (assume several assumptions of parametric tests were violated).

9 Imagine that marketing researchers working for a food company want to determine whether children would prefer ketchup of a different color. They develop green to compare to their standard red. Both taste the same. They have children taste both ketchups (a correlated-groups design) and rank them on a scale of 1 - 10.

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10 A researcher is interested in whether type of music influences how much money is spent in a department store. Repeat customers are asked to turn in their receipts over the last three months to participate in the study. Each month, music varied - one month, classical music was played; another month, jazz was played, and in the third month, country was played. Average money spent per transaction for each month was compared across the three music types for each customer. (Only customers who submitted receipts for all three months were allowed to participate). Data was skewed.

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